Lock.



No. 721,399.. PATENTED PEB. 24, 1903.

H. P. TOWNSEND.

LOCK

APPLICATION FILED PEB. Z8. 1902.

L E D 0 M 0 .Nv

f I/:fwr ...um

UNITED 'STATES PATENT OFFICE.

HARRY P. TOIVNSEND, OF ANVV BRITAIN, CONNECTICUT.

LOCK'.

SPECIFICATION forming part of Letters Patent No. 721,399, dated February24, 1903.

Application filed February 28, 1902. Serial No. 96,084. (No model.)

To @ZZ whom t may concern.: v

Be it known that I, HARRY P. ToW-NsEND, a citizen of the United Statesof America, residing at New Britain, in the county of Hartford and Stateof Connecticut, have invented certain new and useful Improvements inLocks, of which the following is a specification.

The object of this invention is to produce a device of the classspecified having features of novelty and advantage.

Figure 1 is a front view of the lock. Fig. 2 is a central verticalsection on the line so of Fig. l. Fig. 3 is a view of the lock'with thefront casing removed, showing the parts uulocked. Fig. 4 is a Viewsimilar to Fig. 3, but showing the parts locked. Fig. 5 is a detailperspective view of the lock-bolt.

Referringto the drawings, A B denote the two parts of the lock-cases,Which are adapted to be secured together in any desired manner--as, forinstance, by screws.

c is an opening through the casing A for the recept-ion of the latch C.

D is the latch-plate, pressed upward by the spring cl against alug E,which limits its upward movement. This latch-plate being continuallypressed'upward by the spring d normally extends across the opening cthrough the case A, and that part of the plate which extends across theopening is beveled off, as seen in Figs. 2, 3, and 4, so that when theparts are in the positionv shown in Fig. 3 and the latch C is pressed inthe latch-plate will be retracted until the latch C is in position, whenthe spring d will throw /it up to engage the notch in the latch C tolock it. The latchplate when unlocked can be disengaged from the latchby a downward pressure on the cap A', which is connected to thelatch-plate by the pins cl'. This latch-plate has two openings F F'through it, which are in communication with one another. In the openingF' is a stump B', secured to the casing B, preferably integraltherewith. In the opening F is located a lock-bolt G, shorter than theopening, so that it may have a movement from side to side therein. Onthelower side of the lockbolt and on the lower side of the opening F areformed lugs g g. The lock-bolt is heldin position by the curved springH. This locklatch-plate, and oppositethe key-stump K it has a raisedportion or rib adaptedV to coperate with the steps on the key to operatethe lock-bolt.

When the parts are in the position shown in Fig. 3, the lug g'of thebolt is on the righthand side of the lug g' on the latch-plate and thelatch-plate is free to move up and down to lock and unlock the latch.When it is desired to lock the latch-plate, the key is inserted andturned, iirst raising the bolt to disengage the lugs g g', then throwingthe bolt to the left until it occupies the position back of the stump B'and the lug g is to the left' of the lug g. The parts now occupy thepositions shown in Fig. 4, audit willbe seen that thev latch-platecannot be moved, for the reason 4that the stu mp B', which' is securedto the c casing B, is surrounded by thelatch-plate and the bolt. Theadvantages of a lock of this kind are apparent, the most important beingthat I am able to produce an effective lock which at the same time isextremely compact and very simple in its operation and inexpensive inits manufacture.

In other locks of this class which have heretofore been made it hasalways been customary to make use of tumblers, which increase theexpense of the lock greatly, render it more liable to get out of order,and .materially increased the size of the lock.

I am aware that my invention is susceptible' of modification, and I wishto include herein any modifications which come withinv 2. In-a device ofthe class specified in com` bination the casing, the latch-plate locatedtherein, au opening through said latch-plate,

bolt is preferably of the same thickness as the the bolt and thelatch-plate, and the key-rib IOO integrally secured to said lock-bolt,all substantially as described and for the purposes set forth.

3. In a device ofthe class specified in combination the casing, thelatch-plate located therein, a large and a small opening in saidlatch-plate communicating with one another, a stump secured to thecasing and projecting into the smaller opening, a lock-bolt located inthe larger opening and adapted to movement from side to side therein,interengaging lugs on the bolt and the latch-plate, a keyrib integralwith said lock-bolt and projecting slightly above the surface thereof,and a spring acting on said lock-bolt, all substantially as describedand for the purposes set forth.

4. In combination in a device of the class specified the casing, thelatch-plate located HARRY P. TOVVNSEND.

Witnesses:

G. E. Roor, L. B. MALLORY.

